Vent valve of ship gearbox

Abstract

In order to solve the problem that a transmission system is easy to damage due to the fact that water enters a gearbox because an exhaust channel of an existing ship gearbox exhaust valve cannot be closed in time when the existing ship gearbox exhaust valve encounters the water, the ship gearbox exhaust valve comprises a valve seat, a valve cover and a valve core, the valve cover is buckled on the valve seat, a cavity is formed between the valve cover and the valve seat, and the valve element is arranged in the cavity; the valve seat is provided with a gear box communicating opening, and the gear box communicating opening is communicated with the cavity. An elastic supporting piece capable of stretching out and drawing back in the connecting direction of the valve cover and the valve seat is arranged between the valve cover and the valve seat. And a sealing structure capable of being opened and closed is arranged between the valve cover and the valve seat. According to the technical scheme, water can be prevented from flowing backwards into the gear box through the exhaust valve, the safety of a ship transmission system is improved, and the exhaust valve can be widely applied to the technical field of gear boxes of ships.

Description

Technical Field

[0001] This utility model relates to the field of valve sealing technology, and in particular to the sealing technology of exhaust valves for ship gearboxes. Background Technology

[0002] As a core component of transmission systems, gearboxes play a crucial role in various fields such as aerospace, wind power, and shipbuilding. During operation, excessive internal pressure can cause excessive gas expansion within the gearbox, potentially leading to gear seizure. Furthermore, excessive internal pressure can reduce the gearbox's sealing performance, thus posing a safety hazard.

[0003] A gearbox exhaust valve is a protective device installed on a gearbox. Its main function is to release air through the exhaust passage of the gearbox when the pressure inside the gearbox is too high, thereby reducing the pressure inside the gearbox and maintaining the pressure balance inside and outside the gearbox.

[0004] Existing ship gearbox exhaust valves have the following problems in practical applications: When a ship encounters an accident (hull damage, tilting, pipe rupture, etc.) that causes water to enter the cabin and submerge the gearbox, if the gearbox exhaust valve cannot be closed in time, water can easily backflow into the gearbox through the exhaust channel of the exhaust valve, causing damage or destruction to the internal structure of the gearbox, which in turn leads to the failure of the ship's transmission system, affecting the ship's continuous navigation performance and combat capability. Utility Model Content

[0005] To address the problem that existing ship gearbox exhaust valves cannot close the exhaust channel in time when exposed to water, resulting in water entering the gearbox and causing damage to the transmission system, this utility model provides a ship gearbox exhaust valve.

[0006] The technical solution of this utility model is as follows:

[0007] A ship gearbox exhaust valve includes a valve seat, a valve cover, and a valve core; the valve cover is fastened to the valve seat, forming a cavity between the valve cover and the valve seat, and the valve core is disposed in the cavity; a gearbox communication port is provided on the valve seat, and the gearbox communication port communicates with the cavity; an elastic support member that can extend and retract along the connection direction between the valve cover and the valve seat is provided between the valve cover and the valve seat; and an openable and closable sealing structure is provided between the valve cover and the valve seat.

[0008] Optionally, the openable sealing structure includes mating surfaces extending horizontally on the valve cover and the valve seat, respectively, and mutually matching concave and convex structures respectively provided on the mating surfaces.

[0009] Optionally, the concave-convex structure is arranged around the connecting axis formed by the connection between the valve cover and the valve seat.

[0010] Optionally, a cylindrical wall extending into the cavity is provided on the valve seat; a valve cover exhaust channel is provided between the cylindrical wall and the inner wall of the valve cover; the valve cover exhaust channel is connected to the openable and closable sealing structure.

[0011] Optionally, the valve core is disposed within the space formed by the cylindrical wall; the gearbox communication port is connected to the space formed by the cylindrical wall; a valve core exhaust channel is provided between the valve core and the cylindrical wall; the valve core exhaust channel is connected to the valve cover exhaust channel.

[0012] Optionally, a buffer cavity is provided between the valve core and the gearbox communication port.

[0013] Optionally, an oil storage groove is provided on the surface of the valve core facing the cylindrical wall.

[0014] Optionally, matching engagement guide grooves and engagement guide rails are respectively provided on the outer side of the cylindrical wall and the inner wall of the valve cover.

[0015] Optionally, the elastic support member is provided in the snap-fit ​​guide groove, and the extension and retraction direction of the elastic support member is parallel to the long axis direction of the snap-fit ​​guide groove.

[0016] Optionally, a sponge structure is provided within the space formed by the cylindrical wall.

[0017] Optionally, the gearbox communication port is provided with a flange facing the gearbox.

[0018] The technical effects of this utility model are as follows:

[0019] This utility model discloses a ship gearbox exhaust valve with an openable and closable sealing structure between the valve cover and the valve seat, and an elastic support member between them, allowing the openable and closable sealing structure to be slightly open. When the pressure inside the gearbox is too high, the high-pressure gas pushes up the valve cover through the gearbox connection port, causing the valve cover to further separate from the valve seat along the extension and retraction direction of the elastic support member. This further opens the openable and closable sealing structure, allowing the gas inside the gearbox to escape through the opened seal, reducing the pressure inside the gearbox. The openable and closable sealing structure thus functions as the exhaust port of the gearbox exhaust valve. When the ship is flooded and the gearbox exhaust valve is submerged, the water pressure acts on the valve cover, causing the elastic support member to contract, thereby closing the openable and closable sealing structure and preventing water from flowing back into the gearbox. When the water recedes and the pressure is released, the elastic support member extends, and the openable and closable sealing structure returns to a slightly open state, allowing the ship gearbox exhaust valve to resume normal operation, achieving the purpose of this utility model.

[0020] The further effects of the above-mentioned alternative methods will be explained in detail below with reference to specific implementation methods. Attached Figure Description

[0021] Figure 1 This is a front view of an embodiment of the present utility model.

[0022] Figure 2 for Figure 1 A cross-sectional view of the embodiment shown.

[0023] Figure 3 for Figure 1 A sectional perspective view of the embodiment shown.

[0024] Figure 4 for Figure 1 A perspective view of the valve seat in the illustrated embodiment.

[0025] Figure 5 for Figure 1 A cross-sectional view of the valve cover in the illustrated embodiment.

[0026] Figure 6 for Figure 1 A perspective view of the valve core in the illustrated embodiment.

[0027] The markings in the image are explained as follows:

[0028] 101. Valve cover; 102. Valve seat; 103. Gearbox connection port;

[0029] 201. Sponge structure; 202. Valve core; 203. Cylindrical wall; 204. Buffer chamber; 205. Spring; 206. Openable and closable sealing structure;

[0030] 401. Engage the guide groove;

[0031] 501. Engage the guide rail;

[0032] 601. Fixing base; 602. Oil storage groove; 603. Through hole. Detailed Implementation

[0033] The technical solution of this utility model will be described in detail below with reference to the embodiments shown in the accompanying drawings.

[0034] Figure 1 The appearance of the ship gearbox exhaust valve of this utility model is shown. Figure 1 As shown, the ship's gearbox exhaust valve includes a valve seat 102 and a valve cover 101. The valve cover 101 is fastened to the valve seat 102. The valve cover 101 has a top hat-shaped structure, including an opening for... Figure 1A brim-shaped protrusion extends horizontally from the valve seat 102. A receiving portion is also provided on the valve seat 102 corresponding to the brim-shaped protrusion of the valve cover 101. A gearbox communication port 103 is provided below the valve seat 102. Figure 1 The image shows a flange in the gearbox connection port 103 that extends into the gearbox, and the flange is provided with external threads.

[0035] Figure 2 The internal structure of the ship's gearbox exhaust valve is further revealed. Figure 1 and Figure 2 The fastening relationship between the valve cover 101 and the valve seat 102 shown is their assembly relationship. Meanwhile, Figure 1 and Figure 2 The vertical direction shown is parallel to the direction of gravity after the valve cover 101 and valve seat 102 are assembled. For example... Figure 2 As shown, the valve cover 101 and valve seat 102, when fastened together, form a closed cavity. Specifically, the valve seat 102 is provided with a cylindrical wall 203 extending into the inner cavity of the valve cover 101. The valve cover 101 is fitted onto the cylindrical wall 203, with the outer wall of the cylindrical wall 203 adjacent to the inner wall of the valve cover 101, forming a valve cover exhaust channel between them. The valve core 202 is disposed within the cylindrical wall 203, and the gearbox connection port 103 communicates with this cavity space. The space between the valve core 202 and the gearbox connection port 103 is a buffer cavity. A sponge structure 201 is also provided above the valve core 202. The gap between the outer wall of the valve core 202 and the cylindrical wall 203 forms a valve core exhaust channel. The space above the cylindrical wall 203 is connected between the valve cover exhaust channel and the valve core exhaust channel.

[0036] like Figure 2 and Figure 3 As shown, Figure 1 The valve cover 101, as described above, has a horizontally extending brim-shaped protrusion, and the valve seat 102, corresponding to the receiving portion of the brim-shaped protrusion, has mutually engaging mating surfaces. These mating surfaces are respectively provided with mutually matching concave-convex structures. These concave-convex structures form an openable and closable sealing structure 206. In other embodiments, a sealing material layer may be further provided on the surface of the concave-convex structures. The valve cover exhaust channel communicates with the openable and closable sealing structure 206. Figure 3 and 4 As shown, the cap-shaped protrusion of the openable sealing structure 206 surrounds the connecting axis formed by the valve cover 101 and the valve seat 102. When the valve cover is closed downwards, the openable sealing structure 206 forms a completely sealed state between the valve cover 101 and the valve seat 102. Figure 2 and Figure 4 As can be seen, the convex and concave structure of the openable and closable sealing structure 206 is composed of a closed ring-shaped flange and a matching groove, and the cross-section of the flange and the groove is trapezoidal.

[0037] like Figure 2 As shown, a spring 205 is also provided between the valve cover 101 and the valve seat 102. The extension and contraction direction of the spring 205 is parallel to the direction of gravity.

[0038] like Figure 4 As shown, a snap-fit ​​guide groove 401 is provided on the outer wall of the cylindrical wall 203, with its vertical direction being the direction of its major axis. The length of the snap-fit ​​guide groove 401 is approximately equal to the height of the cylindrical wall 203. Figure 5 As shown, a snap-fit ​​guide rail 501 matching the snap-fit ​​guide groove 401 is provided on the inner wall of the valve cover 101. The length of the snap-fit ​​guide rail 501 is less than the length of the snap-fit ​​guide groove 401, so that after the snap-fit ​​guide rail 501 is assembled into the snap-fit ​​guide groove 401, there is still space at one end of the snap-fit ​​guide groove 401 for installing the spring 205. Figure 1 A cross-section is made in the horizontal direction shown. On this cross-section, the radial dimension of the engaging guide rail 501 along the cylindrical wall 203 is greater than the radial dimension of the engaging guide groove 401 along the cylindrical wall 203, so that the engaging guide rail 501 supports the valve cover 101 and the cylindrical wall 203 to form the valve cover exhaust channel.

[0039] like Figure 2 and Figure 6 As shown, the valve core 202 is basically cylindrical, and its diameter is smaller than the inner diameter of the cylindrical wall 203. A horizontally extending flange is provided at the upper end of the valve core 202, which can connect with the inner wall of the valve cover 101 to fix the valve core 202. A through hole 603 is provided on the flange of the valve core 202. An oil storage groove 602 is provided on the outer surface of the valve core 202 (i.e., the outer surface facing the inner wall of the cylindrical wall 203 in the installed state).

[0040] The working process of the ship gearbox exhaust valve of this utility model will be described below with reference to the accompanying drawings, so as to further illustrate the technical solution of this utility model.

[0041] Once the ship's gearbox exhaust valve is installed, the valve cover 101 engages with the valve seat 102 under gravity. When the pressure inside the gearbox is low, the openable sealing structure 206 is slightly open due to the support of the spring 205. The cylindrical wall 203 extends into the valve cover 101, ensuring that the valve cover 101 does not detach from the valve seat 102 when the ship tilts.

[0042] When the pressure inside the gearbox is too high, oil and gas enter the buffer chamber 204 through the gearbox connection port 103. The oil and gas release some pressure in the buffer chamber 204, allowing for separation. The separated oil remains in the buffer chamber 204 and then flows back into the gearbox, while the separated oil-gas mixture further passes through the valve core exhaust channel, through hole 603, sponge structure 201, and valve cover exhaust channel. The narrow channels formed by the valve core exhaust channel and through hole 603 can impede the flow of the oil-gas mixture, further separating the oil and gas. The oil storage groove 602 on the valve core 202 can temporarily store the separated oil, which will flow back after the pressure inside the gearbox decreases. The sponge structure 201 can further filter the oil in the oil-gas mixture and also prevent external impurities from entering the gearbox. As the internal pressure of the gearbox is transmitted through the aforementioned oil and gas, the valve cover 101 is lifted, which in turn causes the openable sealing structure 206 to open further. The gas filtered by the sponge structure 201 is discharged through the valve cover exhaust channel and the openable sealing structure 206, thereby reducing the pressure inside the gearbox. The oil filtered by the sponge structure 201 enters the buffer chamber 204 through the through hole 603 and the valve core exhaust channel, and then flows back into the gearbox.

[0043] When the environment surrounding the gearbox is flooded, the weight of the water acts on the valve cover 101, causing it to tightly engage with the valve seat 102. This keeps the openable sealing structure 206 closed, preventing water from flowing back into the gearbox and ensuring the safety of the transmission system during flooding. Because the valve cover 101 and valve seat 102 have horizontally extending brim-like protrusions and receiving portions, they have a larger horizontal force-bearing area. During flooding, the water exerts greater pressure on the valve cover 101, further improving the sealing performance of the openable sealing structure 206. When the water is drained and the water pressure on the valve cover 101 is removed, the valve cover 101 returns to its initial position under the elastic force of the spring 205, and the openable sealing structure 206 is once again slightly open.

[0044] It is worth noting that the above description is only a preferred embodiment of this utility model and does not limit the scope of patent protection of this utility model. This utility model can also be replaced by equivalent technology. Therefore, all equivalent changes made based on the description and drawings of this utility model, or direct or indirect applications to other related technical fields, are included within the scope of this utility model.

Claims

1. A ship gearbox exhaust valve, characterized in that: The device includes a valve seat, a valve cover, and a valve core; the valve cover is fastened to the valve seat, forming a cavity between the valve cover and the valve seat, and the valve core is disposed in the cavity; a gearbox communication port is provided on the valve seat, and the gearbox communication port communicates with the cavity; an elastic support member that can extend and retract along the connection direction between the valve cover and the valve seat is provided between the valve cover and the valve seat; and an openable and closable sealing structure is provided between the valve cover and the valve seat.

2. The ship gearbox exhaust valve according to claim 1, characterized in that: The openable sealing structure includes mating surfaces extending horizontally on the valve cover and the valve seat, respectively, and matching concave and convex structures respectively provided on the mating surfaces.

3. The ship gearbox exhaust valve according to claim 2, characterized in that: The concave-convex structure is arranged around the connecting axis formed by the connection between the valve cover and the valve seat.

4. The ship gearbox exhaust valve according to claim 1, characterized in that: A cylindrical wall extending into the cavity is provided on the valve seat; a valve cover exhaust channel is provided between the cylindrical wall and the inner wall of the valve cover; the valve cover exhaust channel is connected to the openable and closable sealing structure.

5. The ship gearbox exhaust valve according to claim 4, characterized in that: The valve core is disposed within the space formed by the cylindrical wall; the gearbox communication port is connected to the space formed by the cylindrical wall; a valve core exhaust channel is provided between the valve core and the cylindrical wall; the valve core exhaust channel is connected to the valve cover exhaust channel.

6. The ship gearbox exhaust valve according to claim 5, characterized in that: A buffer cavity is provided between the valve core and the gearbox communication port.

7. The ship gearbox exhaust valve according to claim 5, characterized in that: An oil storage groove is provided on the surface of the valve core facing the cylindrical wall.

8. The ship gearbox exhaust valve according to claim 4, characterized in that: Matching engagement guide grooves and engagement guide rails are respectively provided on the outer side of the cylindrical wall and the inner wall of the valve cover.

9. The ship gearbox exhaust valve according to claim 8, characterized in that: The elastic support is provided in the snap-fit ​​guide groove, and the extension and retraction direction of the elastic support is parallel to the long axis direction of the snap-fit ​​guide groove.

10. The ship gearbox exhaust valve according to claim 1, characterized in that: The gearbox communication port is provided with a flange facing the gearbox.

Images